1. Place nuts and salt in a food processor or very good blender, such as a Vita-mix (make sure to follow your blender instructions and use the correct attachments, if necessary) and grind to a fine powder.
2. Add coconut oil and sweetener (if desired) and process until smooth.
3. Store in an airtight container in the refrigerator.

Note: It may be slightly runny at first, but will harden a bit after it has chilled.